Engineered for Excellence and Efficiency

Enhance your engine performance with the FASWORX cast iron exhaust manifold, exhaust gaskets, and bolts—a premium aftermarket solution for your Penta OMC 5.0L, 5.7L V8 engine (1992 and newer). These robust exhaust manifolds for V8 engines, weighing about 40 lbs. each, are engineered to match OEM specs, ensuring a perfect fit for your wet joint exhaust systems and model numbers 3857723 and 3847501. Each manifold is made from high-quality cast iron and specially coated to resist corrosion, promising reliability in freshwater and saltwater.

Why Cast Iron Is the Choice for Serious Boaters

Compared to carbon steel or stainless steel, your cast iron Penta OMC manifold kit is superior in durability, longevity, performance, and more. It can improve your engine's exhaust flow, translating to better fuel efficiency and enhanced output. Cast iron is also resistant to overheating and vibration so you can trust there is smooth sailing ahead and a reduced risk of cracks and gasket blows. Whether you enjoy laid-back cruising, fishing excursions, or thrilling watersports, your 305 350 GL GXI V8 Penta OMC manifolds will optimize your engine for power and efficiency.

Trust FASWORX for a Job Well Done

Set sail with renewed confidence and enhanced engine performance. Decades of on-water experience inform our expertly engineered marine parts designed for mechanics and DIY boaters alike, keeping your engine in peak operating condition.

Don't let engine troubles keep you ashore; choose FASWORX parts and enjoy a smoother, more reliable experience.